Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eb9a8e20288a859ec95cf9f09811d6f2b5a8fbba6a8fd1b73d9a12562265c69' 
  AND token = 'g+FRCmjc3H0R2uC10MYemi3gGVsZCUkQWToGCa80eU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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