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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '744922b2d76596ec7c6330e396478976914c373b39288675d4ccccee2bd73c1e' 
  AND token = 'G9dj+Ds0n1fHMRI03jI8GjeyPV6occHPls578UZGSPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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