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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '550d201d00bcb4dc11a8d6eacb6685e640a51d66019005469a96e5f507f4f771' 
  AND token = 'VZwZZGNyFD0kGDFdt6V2LQTAgCkL54RKkVeDEVFau7Y=' 
  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"
    }
  }
}