Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e784c9f66800d0c9e4cb6950867b84902eab19edb96b93338d04c75d0fa27849' 
  AND token = 'ELbuBmMioDko1To+ZhDQOeaeR4Qb1axILHI0Srh1Tp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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