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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c3b97775ad8bc1e0e63053841bb2c50a8db24335b8c77c3715f6a7b3ddc4269' 
  AND token = 'CUGZVHNGBpYQZ0q2lgJYrvochtk33Sunf2gA6fIbTHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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