Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c2637422d05398a9a753e90e298b00ac9c61f20c26a60b59c4dc85271a4d8ad' 
  AND token = 'kpiR4sPyTzvQqhCrk1n5ZC271jshOGalivVghhjAudQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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