Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd8f6fbd40beaec63a9dfbd2c5e4ce0e3f206da7c5b3c426aa2a94b1145a1404' 
  AND token = '1mCjJpSBhRI/hddVm47a/FFJRxRYXA6og8anACNAT2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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