Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e27e03a596e8d0b44f8d6d1dd1a12d1fedfc2adc5ed0732c97906d0ead2fa7b' 
  AND token = 'GVnwn+T7PLi+zu6JNkGBlSQnldAvW8HseRKjULogneI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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