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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '70d1356a951d4d7561e2c6e9a4f8bc0505bac24a1d4d22d3197d52d6a9094d2b' 
  AND token = 'E823y2ngBKlzC9iI0o/4goGHxSXMmZelXP5Nkw57vbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00257

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}