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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1182bfe15c4c99f5b30bf01e15e20314c67412786dad22b8a2b6ba9b8e505fd9' 
  AND token = 'MaaF6EWUa+cOoxp3gLk9aDZgY5qrfLc+Hw2TLOqH8G0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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