SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dbca0d79c45d7d999e0dcc8653c8c6cc143646108818d475eea1533f4bde70d2' 
  AND token = 'GLiYJuBEYGq/dCxzVODd9uUgRW+kAcupCK06RkGrfCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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