Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e0f31ea7e76c2b17f46f1014c78d24d3430f03530327be35b429c129b7be07c' 
  AND token = 'y3IJnwpAMqfNX6oOtJmaeFRC4LzQ4MTFCU6tbKQKdrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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