Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99799aaeaa5388d0020fa2f002457b459140d01fe775f637ce25b6b844e67f86' 
  AND token = 'W10b+PPxORamNbnRTZrB7l4BDn/zBrTll6cL8nzfnz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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