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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd680bd3d234a1e56f378420ee4f447b8354d11d8f64c10a70d2a8e625e278c' 
  AND token = 'TEyie3wULkoC4CAbXcALwWgLK8mc+fgknWgWHOniEYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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