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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68091ef61a781bde2c66ba58b27725c3364d8ae56ec1857245882ff954a11286' 
  AND token = 'Oc4ZL3bCbgaD7h0M0XoKucKmpDNmm9kUAqrr3pXrsVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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