Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2b465ece346862fdac4e83698c06bf563b6224645e799d19e7187491a7e1b6b' 
  AND token = 'q4yrGD4iVcOG+Z/p81E8/9QkpyH6hPoQvULeVZtaeoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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