Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d33383c85acde3f876b0895aef4ef34725075a2c51324633d75b273d0b25779' 
  AND token = 'ZZ0woNgEnKUefpEfCiE581MFSI44v+7Thc9W5DnCUig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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