Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'a583c7bbe91ad03a36c1e7feeeb16ab312552a57cad583b25d160cef40aa0352' 
  AND token = '78FGd4gniUjW3tDVAM9dF2NWKdkdcECG0zPgzPr3kcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01032

JSON explain

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