Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63993403ae1e34e6c1fabd727048489ce35dd167d26dad54b0872d35fadd7abc' 
  AND token = 'fiNhAcrYsfeJrbp8i/abfO6anHMcLuTUxUvoRpR4BMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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