SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cbb85f7c81cf9012605de0aca940732701fa4e73c95c4b755af0b4b112c2c614' 
  AND token = 'hBV6qcWfmYTyuQRSyGhPlVwFB6+4liuNjYRdmIshzVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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