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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a48a5dd07dd3c1138d08cb75f5cca5512ea7b3ee93ba94220599f9c084caf57' 
  AND token = 'nkHdPBUaC6qrn9OZ63yUqOx9hU6oz/EaaYj+leeoz5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00160

JSON explain

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