Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '53fb14dfd770bd5c594142e7459de651d1dd69e732192a54850c18f2c17dee0f' 
  AND token = 'Xecyt1GcevsjnbAWGtr+9lfJkES63OFVJRQD2mEJyc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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