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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0645b03cf9c6e9da69fe5c9815afc4f4fbbf1501cfdabe77a87298ec14b61550' 
  AND token = 'kHsCA5k4tMfcdeZalZM5ovFu06GevO6auLefnC3Z4hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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