Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d9b4c3be08de55cd5b67b33dc12dcb18ba47779801415f16a23b66c3afe3c6d' 
  AND token = 'vKQ3qiKCiouElEm8EaRJ2CVRr+k0SpnZy4ynKh754dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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