SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c5af2d385bcd8ec78a0654b62d0bd2746ed491a69d32126366a94256cea0df7' 
  AND token = 'TG5QBKq0yMUqp/lH9PIYFfYR3uu1TYdLt1iYBhvmcNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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