Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77c27b0a4b954eb5e5e1161c397c97cfae9917cc9449c7a38f025a41d8e00d07' 
  AND token = 'dpL2EvMH4fstGUgvlvAVXJ16ehMU3vqngfaBxSQsGCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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