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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aef2dcd3acb368201d6f5db4f9c0fbb082d0791fe334cd564ac77b5cfe7c1ded' 
  AND token = 'Fjd1a4tZgF/O1ZZS9Mb4gsMr8+jMaD6LeyjXri6wLcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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