Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36b61703cd6537f87e2d15026865a27b62fa12ab94110770ec3868da74a5cc8c' 
  AND token = 'vW7l1aC3r5xtAekauS8wQASwneyrxcKxxQC1XiU/2Fk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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