Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf3d72f5024c9c61260e50d3b6393262fb15be431ab539074977753702ecd14d' 
  AND token = 'QhWIr/jh7syvGkDSMpfxxxqdv7LqDcw6Y7AmOHn2Slo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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