Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76fddeefd1455ed768b647257b545cbc265d09fa7dc3c605c43613df224f2d6' 
  AND token = 'PTCQUuu/7mGlvNUrylVFNyNU06mhhk+2pqIVVjkFp4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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