Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94a0fccb6290e73e41d29b7519376748f29badfb32b6a426ee97502f1e648b70' 
  AND token = '5ykHrp9K92gRIPtSykq/SeSjLQeV+MlUieRuIDH5qGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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