Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58e7afad61e0424365ba4599ca81199b3e23bb3262a5af242449ab84e50077d6' 
  AND token = 'E9N+b3O1Ts9q2ehS34DAnoqbgrMWkH44Lc696v30KOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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