Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b3646479a98086a0a8bdc5900d690a65d540e37c5275e5dee08f41fd6b8838' 
  AND token = '0IOUAp6fURrqwrpAwYxxCubZAMKiJaZeT7axebR6aMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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