Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'b1d4b08e50a315cb1fcca0a3d26938af9303b60b2e9258e3955b883efda3b641' 
  AND token = '1G+PDQFqZ8upzYcnDTwNZ0Oui8k17h2oBM9AC9YeBpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00764

JSON explain

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