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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd67207a121be78e7e64aff4d8e26adf0ff38a633a8aa2465b63b0e109d03cedb' 
  AND token = 'EsJwid0fHIYQYaXO7Ba3vPjuJYhKPzEEsnbQYrGd1mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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