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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fb5fd9371733164b8cee9fbf54d8cb150be538ad022f6465c7db8d247376947' 
  AND token = 'Bd7D/rYoeqI7Vo4A1WWNlcbWO8F4H3e4zNYwd3gQhe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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