Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7ea77f35a120c919b32c22511970c07343d78c115cd360c798b482068d58bfd' 
  AND token = 'bssgLMUeuVIxdeWO8mVOqLxqof2xHz9ay5J19zkIZtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}