Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7b5437bde05defd5bb210a7ba80f2a8a8aface29b5d4ae3f90cc3ed95db8a65' 
  AND token = 'hV6kEQ2iNSSw8PrSW3BfZxdI44y4Gw2LDWWKENDbVMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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