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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c8f22f6ef53548f7ba5cce3a069a06200ce7163c62f11e195c09bb9dfb743af0' 
  AND token = '0/x1V2lP0m1xmvqJksBDfE5qWidOkcXqvX5/RpxTpGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}