Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '57e6c967ffb56ea1bd4d24016bab41fc66093832219c748e92525c3a065c43e1' 
  AND token = 'rf9uRsE0DJ5BqbhY01rju/bUmKi497cvp8ryGODZb6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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