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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01b26894059818fa9621145ba3d81ef5192ccf32fdf3693b66b22bb1d5673b5f' 
  AND token = 'rIgMcLD90dZddpD2NiLa5+620C1hB6b2ASYrxh7yTBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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