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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd865f67ae65116ec2b49f0cee96640219f5b5c24072fdf2bb76e5d68f792194f' 
  AND token = 'AxumNnJ5rNw50PSt7ycw7nA7m08p8vuxeGYa6xGwqh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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