Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e10a8d787d4813f25b7c9a7639349ad28d2a554dea59d8533c1d2ef5ba30f7f0' 
  AND token = 'NKxsOqBtySQwM/SuDNKAvkwAWqkFMr20QDLxtD32lfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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