Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de9c12e67ab810e4d6a714de82551ff2a0085c04552a722caf76e1d82c1a2563' 
  AND token = 'AySq2ZWSVccpzhMwJ+Z2wu1DW6iH5sNBz3mt4KmRj4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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