Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ae7a790c01b83a8250c2a6d881d19adb297b92bd593b2f4500f1db244b32d50' 
  AND token = 'KT2N8z8SVfK5e4V5fOx2GaND+UEA0l2djgD0/FJLXBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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