Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4b32b1b078d4783fc9f1a70f5c6d523005e9667f162a4290e468ad560235e4a' 
  AND token = 'v4PW3EC430FulLT8/lCHem28g1JmkbRUgb07t+KIqdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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