Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa1afd9cdbf92ca6b1587704ee80ee774a0b8996b0e59aca102b1a2ab5209ca6' 
  AND token = 'U4dGBM5JgPvmtafPM/J7BmQ/Iu/rZayCAnUFS1QLWBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}