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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '162d9b942c1eb0c24abcb917e631f51cbcf2c111dae40ca94bf38c2502e83165' 
  AND token = 'LY45IC2kUBlI2JD5+89mGv0QJYlq7bsp/4Sd6U6DHcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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