Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'a0ac062c1f1dc12a528fa5c16f128c3c21a5673f4a0e762ded7286eebe19410f' 
  AND token = 'SB05GDOD7V04rHCnv87Kwn3mfo19IBUNS19t8WQpc7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00757

JSON explain

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