Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a0e43f1018d641869cc8aaf56c3c4fbcdc25895ac0dfcbf998312c6feaa892c' 
  AND token = 'uMvxyXp1r3GkUH9IyjGHX7Nmicw4UtfCe06xyvGFroI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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