Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13c42cc31677143ca9c6838f06e363553d5e7069c23757b7ea12289de478e5fc' 
  AND token = 'W490B2redJltg71GfSc8JAd46uX8a2EmECcVd7xRYV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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