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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ecddb314997e338f1dceb5b2ede6f8c08c422cec6d505e809826ebd13ddcd6' 
  AND token = 'm3BOcXkjE5qH650b0cXlQrLd8GEOlOSx9JJ9AotT2tA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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