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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cb3c632177c0dc072de7ac384b81c6c762f7fac0fc11e64e042eb8e5f3ecf52' 
  AND token = 'PwmnbO46SSzF/qoMKr/EGHrT0E+LeSEFAlxg1qN/4Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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