SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5002bb93e051174790769a1749d41ebc28916852fb0d81dd74c8574db0bc2db4' 
  AND token = 'HSwvI9aHJkWn1mVIBK5CUkFvZjzsOSBUZ4agD9Lp2sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}