Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '718b96c3aff523440873f6bebb55fa20e70fbad60426e3cfbdd6b60f0e17ff4a' 
  AND token = 'QxHRM9hzLp3903acbS1G1vYm1U1CP9ke3RQA+tSmTAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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