Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64cfffce18fc5c1ecac44aabc378b72e115ecf56db5634ed505b80636459d4ea' 
  AND token = 'k/5e1I40nZaQgG6fERkC6XV3SJm786g+cMBzC/zBnmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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