Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cbac3d0a824bac6206dc8495eca9f6c66e27b7332cbcb4a528cfd7484b7585b' 
  AND token = 'OuwNSI1uW8IpjhJJ0bWagWdq//T3Caf1Rnlrz5cvkEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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