Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eacf728333689d53dc9327f49540aca1bd3b7a0733b012556cf3903d30e00b8' 
  AND token = 'Wa3M3V3LnnrkNnOQpiaDlz678Q1r3L/7nfX3mXnA+Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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