Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a69a7a96bb3c4f5982ef956fe4bffa8800c2d1410da66e10978a43e9ee619eb9' 
  AND token = 'CHmvOIwd10HlymHjQllO3Yrve87dCIC5/uyb+zdqTbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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