Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eab0f2bb25e8ec8f14b25776035c550b00f21f47c4a609d97f5d778a1fbf92c5' 
  AND token = 'JHnqaw9EViAojiMf3BdwmCzVsMXmVx85YimJVNJXfAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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