SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '694e959b83e872a43ff3ea77e11680c65aba2baa8eb983640fcb05b3b35f1f0b' 
  AND token = 'XdROD+Ijb+oqVQBor1EFB/h8cCkLY1TE9KJL7n5aZbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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