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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84b088fa411db3080203b5f33e91840ab58533b2edf4adb8a365f9cd6abc7945' 
  AND token = 'mk/IweDC0LGpzQ8r005ch+qFgDrrhRxRch0MJLdp1/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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