Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9286406810d4ecf0c939767b67f171a19c11b93c9e281f700fe82f592429ccfc' 
  AND token = 'm5MUYdrgQB7xVUUw9QgBLp3RsmRUV832+3zhgsd0epQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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