Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '292f40a7536231b5bd925e014c03e670d7a0093f74d4d798fc9592b9a5049feb' 
  AND token = 'QxZRttffTKk1PfsT0tAo279T4g1apt6Qt/2PVhJ9LCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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